Temperature and feed flow rate effects properties of spray dried papaya leaf powder

Abstract

The present study aims to determine the effects of inlet air temperature and feed rate on the main powder properties during spray drying of papaya leaf powder. Parameters analyzed were yield, moisture, color and flavonoid content. Design expert with three inlet air temperatures (130, 140 and 150°C) and three feed rate levels (350, 475 and 600 mL/h) were investigated. There was significant effect of inlet air temperature and feed rate on yield, color and moisture content while no remarkable changes in flavonoid content was observed. Increase in feed rate substantially reduced production of papaya leaf powder. Furthermore, the amount powder was higher with elevated feed rate but lesser with increasing inlet temperature.